miller



(No Model.) 2 Sheets-Sheet 1.

D. J. MILLER. DRIVING MACHINERY FOR TRACTION ROPE RAILWAY$. No.804,017.. v Patented'Aug. 26-, 188 4.

F,z/ 9.l

lIHHHHHlIlI ll ll II I H H H l ll 1H! I! II II It I! II II W WITNESSESIJYVENTOR W .Danz'el JTMiLZer,

,By his flttorncys Q16. mmm,

n. PEYERS. mwwmnn n hm Washington. uV-c.

(No Model.) 2 Shets-Sheet 2. D. J. MILLER. DRIVING MACHINERY FORTRACTION ROPE RAILWAYS. No. 304,017. Patented Aug. 26, 1884.

UNTTED Sra'rns PATENT rrrca.

DANIEL J. MILLER, OF NEW YORK, N. Y.

DRIVING MACHINERY FOR TRACTION-ROPE RAILWAYS.

SPECIFICATION forming part of Letters Patent No. 304,017, dated August26, 1884.

Application filed January .15, 1884. (No model.)

To all whom it may concern- Be it known that I, DANIEL J. MILLER, of thecity, county, and State of New York, have made certain new and usefulImprovements in Driving Machinery for Traction-Rope Railways, of whichthe following is a specification.

The invention consists of two driving-sheaves mounted on shafts, eachshaft having a driving-gear, said sheaves having several grooves for thetractionrope to run in. The sheaves are tilted in opposite directions,so that the cable is carried from one groove to the next as it passesfrom one sheave to the other.

The invention consists more particularly in an intermediate gear on ahorizontal shaft, the gear having diagonally-arranged or spirallypitchedteeth, to meet the straight teeth of the tilted gears on thesheave-shafts.

The object of this invention is to make both sheaves drivers, and passthe cable direct from one groove to another, and thus have as few bendsin the rope as possible, for it but one sheave was a driver and theother an idler, it would be necessary to make twice the number of bendsin the rope to produce the same result.

The accompanying drawings form partof this specification.

Figure 1 is a plan of the machinery. S S represent the two sheaves. g 9represent the gears on the driving-sheave shafts, h the in termediategear, and if the driving'gear.

Fig. 2 is a side elevation of the sheaves S S, and shows the directionof the cables as they pass from one sheave to the next.

Fig. 3 is aview of the driving-sheaves, shafts, and gears, theheavylines representing the first sheave, S, and the dotted linesrepresenting the second sheave, S

Fig. 4 is an elevation of the intermediate gear, 71., representing thepitch of the teeth.

In Fig. 2, (a side elevation of sheaves,) a represents the cable coriiing to the sheave. The

cable passes into the first (1st) groove (see Fig. 3) in sheave S, iscarried half-way around this sheave,and returns to the first groove insheave S, makes half a wrap on sheave S, and returns to second groove insheave S Thus, by continuous wraps on the sheaves, the cable is carriedfrom one groove to the next as it passes from one sheave to another. Byhaving the sheaves tilted in this manner the cables are held on a directline when passing into the grooves.

It will be seen in Fig. 3 that the sheaves are moved so that the groovesare ona direct line on the bottom, and lap just one groove at the top.The teeth of the gears on the sheaveshafts are ,kept straight, but theintermediate gear has teeth diagonally arranged, or with a spiral pitchequal to the angle of the sheaveshafts. These shafts being pitched inopposite directions makes the straight teeth of the tilted gears g and 9correspond exactly with the spiral or diagonal teeth of the intermediategear.

In the plan (Fig. 1) it will be seen that the intermediate gear can beused as a driver, and

the gear 75* can be abandoned should it be deemed preferable to do so.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. The intermediate gear having spirallypitched or diagonally-arrangedteeth to operate in combination with the straight teeth of the tiltedgears on the driving-sheave shafts, for the purpose specified.

2. The tilted driving-sheaves, with several grooves for the tractionrope, when both sheaves are made drivers and connected by gears, asherein set forth.

' D. J. MILLER. Witnesses:

0. LUNDQUIST, B. M. STROHN.

